Definitions

1. noun

A person or thing that decides or settles a matter, issue, or problem.

“The decider in the game was the final quarter, where the team made a dramatic comeback.”

2. verb

To decide or settle a matter, issue, or problem.

“The new policy will decider the issue of whether to extend the school day.”

3. noun

The person or thing that has the last say or makes the final decision.

“In the presidential election, the decider was the swing state that ultimately chose the winner.”